Chlorine trifluoride, ClF3, is a valuable reagent because it can be used to convert metal oxides to metal fluorides:
6 NiO(s) + 4 ClF3(g) → 6 NiF2(s) + 2 Cl2(g) + 3 O2(g)
(a) What mass of NiO will react with ClF3 gas if the gas has a pressure of 250 mm Hg at 20 °C in a 2.5-L flask?
(b) If the ClF3 described in part (a) is completely consumed, what are the partial pressures of Cl2 and of O2 in the 2.5-L flask at 20 °C (in mm Hg)? What is the total pressure in the flask?